<p>
  <button type="button" class="btn btn-primary btn-sm" (click)="isFirstDisabled = !isFirstDisabled">
    Enable / Disable first panel
  </button>
</p>

<accordion>
  <accordion-group heading="Static Header"
                   [isDisabled]="isFirstDisabled">
    This content is straight in the template.
  </accordion-group>
  <accordion-group heading="Content 1">
    <p>accordion 1</p>
  </accordion-group>
  <accordion-group heading="Content 2">
    <p>accordion 2</p>
  </accordion-group>
</accordion>
